alternety
Newly Enlightened
I am looking at using 1W stars to illuminate a corrider and under-counter task lighting. The problem I am having is finding a constant current source to drive them.
These are fixed devices so I can distribute whatever power I want (e.g., 12 or 24 VDC). I want a small and cheap constant current generator to drive 1 or more diodes in a series string. Everything I have found that does constant current assumes you are running from very low battery voltage and is a step-up regulator. They use inductors and are just more complicated that I want. Resistors use too much power.
Any suggestions for an IC or discrete approach?
These are fixed devices so I can distribute whatever power I want (e.g., 12 or 24 VDC). I want a small and cheap constant current generator to drive 1 or more diodes in a series string. Everything I have found that does constant current assumes you are running from very low battery voltage and is a step-up regulator. They use inductors and are just more complicated that I want. Resistors use too much power.
Any suggestions for an IC or discrete approach?